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Study identifier: NCT04104607 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

The Bispecific PSMAxCD3 Antibody CC-1 in Patients with Castration Resistant Prostate Carcinoma

Condition: Castration-Resistant Prostatic Cancer  ·  Sponsor: University Hospital Tuebingen

PhasePhase 1
Planned participants86
Who can joinMale, 18 Years to no upper limit
Healthy volunteersNo

About this study

This trial is a first in human (FIH) study in patients with castration resistant metastatic prostate cancer (CRPC) after failure of third-line therapy aiming to evaluate safety and efficacy of CC-1, a bispecific antibody (bsAb) with PSMAxCD3 specificity developed within DKTK. CC-1 binds to human prostate-specific membrane antigen (PSMA) on prostate cancer cells as well as to tumor vessels of CRPC, thereby allowing for a dual mode of anti-cancer action. CC-1 was developed in a novel format which not only prolongs serum half-life but most importantly reduces off-target T cell activation with expected fewer side effects. Together with preemptive IL-6 receptor (IL-6R) blockade using tocilizumab, this allows for application of effective bsAb doses with expected high anticancer activity. The study comprises two phases. The first phase is a doseescalation phase with concomitant prophylactic application of tocilizumab to evaluate the maximally tolerated dose (MTD) of CC-1. This is followed by a dose-expansion phase (also with prophylactic IL-6R blockade using tocilizumab), as this approach has been shown to be efficient and beneficial for patients. A translational research program comprising, among others, analysis of CC-1 half-life and the induced immune response as well as molecular profiling in liquid biopsies will serve to better define the mode of action of CC-1 and to identify biomarkers for further clinical development.

This description comes directly from the study's public registry record.

Talk to the study team

Helmut R Salih, Prof.  ·  +49 (0)7071 29-83275  ·  helmut.salih@med.uni-tuebingen.de

Juliane Walz, PD Dr. med.  ·  +49 (0)7071 29-83275  ·  juliane.walz@med.uni-tuebingen.de

Always discuss trial participation with your own doctor first.

Locations (2)

University Hospital TuebingenTübingen, Baden-Wurttemberg, GermanyRecruiting
University hospital HeidelbergHeidelberg, BadenWuerttemberg, GermanyNot Yet Recruiting

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Source record: clinicaltrials.gov/study/NCT04104607